IPO draft-bernstein-optical-bgp-00.txt

["Bernstein, Greg" <GregB@ciena.com>]

NAME OF I-D:
http://www.ietf.org/internet-drafts/draft-bernstein-optical-bgp-00.txt

SUMMARY
Multi Protocol Label Switching (MPLS) has received much attention recently
for use as a control plane for non-packet switched technologies.  In
particular optical technologies have a need to upgrade their control plane.
Many different optical switching and multiplexing technologies exist and
more are sure to come.  For the purposes of this draft we only consider
non-packet (i.e. circuit switching) forms of optical switching.
In this draft we consider the requirements that optical networking and
switching place on exterior gateway protocols such as BGP and interior
gateway protocols such as OSPF.  In particular we look at optical path
diversity, various optical switching and transport capabilities,
bandwidth/resource status and scalability. 
RELATED DOCUMENTS
SONET: ANSI T1.105.XX and latest ANSI drafts
SDH: ITU G.707-2000 and various drafts
Miscellaneous ANSI and ITU drafts related to DWDM, e.g., G.692, etc...
WHERE DOES IT FIT IN THE PICTURE OF THE SUB-IP WORK
 This work describes part of what is needed to measure and control the
optical layer, OPT in the figure below..

Applications         +-------+  +-------+        (new) Hour glass
  that use CCAMP: \    | TE-WG |  | PPVPN |  ...           /
                   \   +-------+  +-------+               /
                    \     +----------------------+       /
                     \    |         CCAMP        |      /
                      \   |-----------+----------|     /  
                      /   |   C       |    M   --|------ IGP LSA ext
                     /    | control   | measure  |     \  
                    /     +----------------------+      \
Technologies to  / +----+ +----+ +----+ +----+ +----+  \
measure/control:/  |MPLS| |OPT | |RPR | |ATM | | FR |...\
                     +----+ +----+ +----+ +----+ +----+


WHY IS IT TARGETED AT THIS WG
The IPO workgroup is currently chartered to look at optical measurement and
control requirements.
JUSTIFICATION
Using a route protocol as a means of automatic topology and resource
discovery and dissemination is a very powerful and valuable capability
previously not available in optical transport equipment. This application,
however, has some key differences and requirements from that of IP layer
routing. For example, there is no general need to standardize the route
computation algorithm in the optical case.  In addition some well known
optical layer requirements such as diverse routing have no IP analogy. Hence
to determine the best way to modify, supplement, or create new protocols for
automatic topology and resource discovery of optical equipment a review of
the unique requirements of the optical layer is ra reasonable place to
begin.  


	Dr. Greg M. Bernstein, Senior Scientist, Ciena 
	New phone: (510) 573-2237